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Finding the Fourth Proportional to 43.32, 64.89 and 36.57

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Solution

The fourth proportional to 43.32, 64.89 and 36.57 is: 54.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.32 : 64.89 = 36.57 : x
  2. Step 2: Convert to fraction form
    43.32/64.89 = 36.57/x
  3. Step 3: Cross multiply
    43.32x = 64.89 × 36.57
  4. Step 4: Simplify right side
    43.32x = 2,373.03
  5. Step 5: Solve for x
    x = 2,373.03/43.32
  6. Step 6: Final answer
    x = 54.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.